5.75″ overall. Rechargeable. Lanyard. Tailcap switch. Water resistant. Impact resistant. Intellibeam technology automatically adjusts light output based on environmental conditions. LED. Micro USB port with charging cable. Up to 1500 lumens. Up to 40 hour runtime on lowest setting. Requires (1) 18650 battery (included), or (2) CR123A batteries (not included). Aluminum construction. Color: Black. Clam packed. Made by SureFire in the USA.